/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.runners.core.construction.graph;



import com.google.auto.value.AutoValue;

import com.bff.gaia.unified.model.pipeline.v1.RunnerApi.PCollection;

import com.bff.gaia.unified.model.pipeline.v1.RunnerApi.PTransform;



/** A graph node which contains some pipeline element. */

public interface PipelineNode {

  static PTransformNode pTransform(String id, PTransform transform) {

    return new AutoValue_PipelineNode_PTransformNode(id, transform);

  }



  static PCollectionNode pCollection(String id, PCollection collection) {

    return new AutoValue_PipelineNode_PCollectionNode(id, collection);

  }



  String getId();



  /** A {@link PipelineNode} which contains a {@link PCollection}. */

  @AutoValue

  abstract class PCollectionNode implements PipelineNode {

    @Override

    public abstract String getId();



    public abstract PCollection getPCollection();

  }



  /** A {@link PipelineNode} which contains a {@link PTransform}. */

  @AutoValue

  abstract class PTransformNode implements PipelineNode {

    @Override

    public abstract String getId();



    public abstract PTransform getTransform();

  }

}